Improvement in attaching door-knobs to their spindles



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Lettera Patent No. 79,597,-dated July 7, 1868.

IMPROVEMENT IN ATTA'GEING-DOOR-AKNOBS T0 THEIR SPINDLES.

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'ro ALL WHoM 1T MAYv eoNcERN:

Be it known that {,'SILAS S.V PUTNAM, of Dorchester, in the county of Norfolk, and Statepf Massachusetts, have invented an Improved Method of Attaching Door-Knobs to .their Spindles, and adjusting them thereon for doors of varying thicknesses, of which the following is a full, elear, and enact description, reference being had to the'aceompauying drawings,.;niaking part of this specification, in which-- Figure is an elevation of a'pair of 'door-knobs attached' to their spindle according to my improved method. Figure 2 is a central longitudinal sectionthrough the same. Figures 3 and 4 are details. My invention relates to an improved method of attaching door-knobs to their spindles, whereby their distance apart may be varied to suit doors of dlerent thicknesses, and consists in a regulating-screw, whichpasses through the outer end of the knob into the end of the spindle, serving not only to unite them together, but also to regulate the distance of the knobs 1from each other.

- v v' lo enable others vskilled in the art tounderstand and use my'invention, I will` proceed. to describel the manner in which I have carried it out. y

-In the said drawings, A A represent a pair of door-knobs, which are fitted on tothe opposite ends of the 4spindle B,which passes through the door. This spindle is rectangular in cross-section, as seen in fig. 4, its vextremities sliding in correspondingly-shaped apertures in the Shanks a of the knobs, as seen in iig. 2, which are thus prevented from turning thereon. Each extremity of the spindle B is bored out for the reception of a screw, b, whichepasses through the outer end of the knob, by which means the knob and spindle are firmly secured together, while hy turning the screw in either direction the distance between the knobs may be readily .varied to correspond to the thickness of the door to which they are applied.

c c are washers, which are interposed between the door and `theportions 5 of the shanks a ofthe knobs,

but these washers may be'dispensedwith, if desired, and the ends of the `Shanks enlarged where they abut against the door.

It will be seen that in the event ofthe shrinkage of the door, by turning one'of the screws b, the distance between the knobs may be adjusted with a great degree lot nicety, so as to `force the washers c close up'to the door, and thus avoid the unpleasant rattling incident to the ordinary method of attaching door-knobs to their s indles.

P If-preferred, one of the knobs may be secured to the spindle in the ordinary manner, instead of both of the knobs being 'made adjustable, as described. l

' Claim.

WhatI claim as my invention, and desire to secure by Letters Patent, is- The regulating-screw b, in combinationl with the knob A and spindle B, substantially as described for ,the purpose set forth. l 4 S'ILAS S. PUTNAM.

Witnesses:

P. E. TEscuEnAcHEn, N. W. Srrnmrs. 

